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Rare Minerals Specimens

Tuesday, 24 January 2023 04:00 PM

Introducing the "Rare Minerals Specimens" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including thometzekite, titanowodginite, tundrite-(ce), ulrichite, uytenbogaardtite, and wightmanite and more from places like Tsumeb mine, Tsumeb, Namibia, Tanco pegmatite, Bernic Lake, Manitoba, Canada, Kangerdluarssuq, Ilimaussaq, Greenland, Lake Boga granite quarry, Lake Boga, Victoria, Australia, New Bullfrog mine, Nye Co., Nevada, United States, and Crestmore, Riverside Co., California, United States.

SOLD

Thometzekite - BAC60749

Thometzekite - BAC60749

Thometzekite

#BAC60749

Details
Data
Provenance
Resources

Locality: Tsumeb mine, Tsumeb, Namibia
Formula: PbCu²⁺₂(AsO₄)₂·2H₂O
Availability: Sold
Size: 2.5 x 1.5 x 1.5 cm - Thumbnail
Tagged: arsenate , copper
Special Info: Type Locality

Bluish pearly crystals on unkown platey crystals. Excellent specimen.

Thometzekite

Formula: PbCu²⁺₂(AsO₄)₂·2H₂O
Crystal System: Monoclinic
Luster: Earthy (Dull)
Color: bluish green, green
Streak: white
Class: Monoclinic - Prismatic
Hardness: 4-5

Collection: William & Anne Cook Collection
Special Info: Type Locality

Mineralpedia: View Thometzekite
On Dakota Matrix: Previously Sold Thometzekite
On Dakota Matrix: Other Available Thometzekite
WebMineral: View Thometzekite
Mindat: View Thometzekite

SOLD

Titanowodginite - BAC60762

Titanowodginite - BAC60762

Titanowodginite

#BAC60762

Details
Data
Provenance
Resources

Locality: Tanco pegmatite, Bernic Lake, Manitoba, Canada
Formula: Mn²⁺TiTa₂O₈
Availability: Sold
Size: 2.5 x 1.5 x 1.2 cm - Thumbnail
Tagged: pegmatite mineral
Special Info: Type Locality

1-2mm black crystals in Quartz.

Titanowodginite

Formula: Mn²⁺TiTa₂O₈
Crystal System: Monoclinic
Crystal Habit: Euhedral Crystals
Cleavage: None, None, None
Luster: Vitreous (Glassy)
Color: dark brown, black
Streak: dark brown
Class: Monoclinic - Prismatic
Fracture: Brittle - Irregular
Hardness: 5.5

Collection: William & Anne Cook Collection
Special Info: Type Locality

On Dakota Matrix: Previously Sold Titanowodginite
On Dakota Matrix: Other Available Titanowodginite
WebMineral: View Titanowodginite
Mindat: View Titanowodginite

SOLD

Tundrite-(Ce) - BAC60753

Tundrite-(Ce) - BAC60753

Tundrite-(Ce)

#BAC60753

Details
Data
Provenance
Resources

Locality: Kangerdluarssuq, Ilimaussaq, Greenland
Formula: Na₂Ce³⁺₂TiO₂SiO₄(CO₃)₂
Availability: Sold
Size: 4 x 2.5 x 2 cm - Miniature
Tagged: pegmatite mineral

An excellent 1.7mm golden radiating group of crystals. There is a small one off to the side. Associated with black Aegerine. Ex. University of Copenhagen specimen with tag.

Tundrite-(Ce)

Formula: Na₂Ce³⁺₂TiO₂SiO₄(CO₃)₂
Crystal System: Triclinic
Crystal Habit: Acicular, Striated
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: brownish yellow, greenish yellow
Streak: white
Class: Triclinic - Pinacoidal
Fracture: Brittle - Splintery
Hardness: 3

Collection: William & Anne Cook Collection

Mineralpedia: View Tundrite-(Ce)
On Dakota Matrix: Previously Sold Tundrite-(Ce)
On Dakota Matrix: Other Available Tundrite-(Ce)
WebMineral: View Tundrite-(Ce)
Mindat: View Tundrite-(Ce)

SOLD

Ulrichite - BAC60766

Ulrichite - BAC60766

Ulrichite

#BAC60766

Details
Data
Provenance
Resources

Locality: Lake Boga granite quarry, Lake Boga, Victoria, Australia
Formula: CaCu(UO₂)(PO₄)₂·4H₂O
Availability: Sold
Size: 3 x 2.5 x 1.5 cm - Thumbnail
Tagged: phosphate
Special Info: Type Locality

Bright green bladed crystals in a group to 1mm.

Ulrichite

Formula: CaCu(UO₂)(PO₄)₂·4H₂O
Crystal System: Monoclinic
Crystal Habit: Acicular, Radial
Cleavage: Perfect, None, None
Luster: Vitreous (Glassy)
Color: green, lime green
Streak: white
Class: Monoclinic - Prismatic
Hardness: 3.5

Collection: William & Anne Cook Collection
Special Info: Type Locality

Mineralpedia: View Ulrichite
On Dakota Matrix: Previously Sold Ulrichite
On Dakota Matrix: Other Available Ulrichite
WebMineral: View Ulrichite
Mindat: View Ulrichite

SOLD

Uytenbogaardtite - BAC60759

Uytenbogaardtite - BAC60759

Uytenbogaardtite

with Gold - #BAC60759

Details
Data
Provenance
Resources

Locality: New Bullfrog mine, Nye Co., Nevada, United States
Formula: Ag₃AuS₂
Availability: Sold
Size: 4 x 3 x 1 cm - Miniature
Tagged: sulfide , silver , gold

Dark grey pods of Uytenbogaardtite to 8mm with speckled Gold. Sawed flat on one side.

Uytenbogaardtite

Formula: Ag₃AuS₂
Crystal System: Tetragonal
Crystal Habit: Microscopic Crystals
Luster: Metallic
Color: gray white
Class: Tetragonal - Trapezohedral
Fracture: Brittle
Hardness: 2

Collection: William & Anne Cook Collection

On Dakota Matrix: Previously Sold Uytenbogaardtite
On Dakota Matrix: Other Available Uytenbogaardtite
WebMineral: View Uytenbogaardtite
Mindat: View Uytenbogaardtite

SOLD

Wightmanite - BAC60752

Wightmanite - BAC60752

Wightmanite

in Calcite - #BAC60752

Details
Data
Provenance
Resources

Locality: Crestmore, Riverside Co., California, United States
Formula: Mg₅O(BO₃)(OH)₅·2H₂O
Availability: Sold
Size: 5 x 3 x 2 cm - Miniature
Special Info: Type Locality

Silky white acicular crystals from 1 to 6mm and larger yellow-brown larger crystals to 6mm in blue Calcite.

Wightmanite

Formula: Mg₅O(BO₃)(OH)₅·2H₂O
Crystal System: Monoclinic
Cleavage: Perfect, Distinct, None
Luster: Vitreous (Glassy)
Color: colorless, light green
Streak: white
Class: Monoclinic - Prismatic
Hardness: 5.5

Collection: William & Anne Cook Collection
Special Info: Type Locality

Mineralpedia: View Wightmanite
On Dakota Matrix: Previously Sold Wightmanite
On Dakota Matrix: Other Available Wightmanite
WebMineral: View Wightmanite
Mindat: View Wightmanite

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